Machine Head !!!
There's only a few songs I can't stand from them ("Only The Names" being one that springs to mind).
Burn My Eyes, The Blackening, both fantabulous albums.
Of course Metallica has to have a mention (or a few mentions).
Only really like a couple of Tool's songs at the moment, but trying to get into them more.
Rammstein are another favourite of mine, along with System of a Down (not sure if they fall into the Metal category though).
A UK appearance for Rammstein would be awesome
Gogogo!
Saw Pendulum at Brixton back in November and they did a Master of Puppets remix.
Only about half of the audience knew what it was (shock horror!), but for those of us who did it was epic
These are the only two decent(ish) quality ones I can lay my mitts on at this time: